Number | Name | Date | Kind |
---|---|---|---|
2866298 | Babcock et al. | Dec 1958 | |
3894858 | Rogers | Jul 1975 | |
4152036 | Corson | May 1979 | |
4720657 | Tischer | Dec 1985 | |
4788471 | Strauss | Nov 1988 | |
5080622 | Tuin et al. | Jan 1992 |
Entry |
---|
Derwent Patent Abstract E7858A/25 for non-English Patent DS 1948-739 dated Jun. 15, 1978. |